This addon was indispensible before FF introduced zoom, and worked very well. Now it is useful to enlarge the text size only, while keeping the general zoom set in FF which was 67% - a fix for the latest fashion to use mouse print separated by huge empty spaces in web pages!
The dropdown text/full toggle didnt work I had to set it in options. After that, Ctrl_+/- enlarged/reduced the text only while the frame stayed at 67%. Exactly what I needed.
Had to disable it to view other pages on the site, because I don't have time to figure out all the repercussions of changing config to enable per tab (I recall it stopped the FF default zoom happening on page load, had to click the size button on every tab); also Zoompage adds masses of resizing code in each tab so affects performance.